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• ffmpeg , 2 network cards and multicast stream

  18 juin 2015, par dropbasket

  my knowledge of networks are very poor !!, am a newbie !! ;-)

  I have a small server streaming ffmpeg installed on nginx with 2 network interfaces

  p2p1 is used for WAN which provides http/ssh....

  p4p1 is used to receive multicast data from intranet.

  192.168.0.1 is public network gateway.

  192.168.1.1 is private network gateway (commented for not have internet exit this network)

  239.0.0.*/24 is multicast address.

  Linux distribution
  
  3.13.0-32-generic #57-Ubuntu SMP Tue Jul 15 03:51:08 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
  
  Distributor ID : Ubuntu
  
  Description: Ubuntu 14.04.2 LTS
  
  Release : 14.04
  
  Codename : trusty

  My network interfaces config

  auto lo
  
  iface lo inet loopback
  
  
  
  # NET1
  
  auto p2p1
  
  iface p2p1 inet static
  
          address 192.168.0.100
  
          netmask 255.255.255.0
  
          gateway 192.168.0.1
  
  
  
  # NET2
  
  auto p4p1
  
  iface p4p1 inet static
  
          address 192.168.1.100
  
          netmask 255.255.255.0
  
      ### gateway 192.168.1.1

  Now my route table

  root@srv:# route
  
  Tabla de rutas IP del núcleo
  
  Destino         Pasarela        Genmask         Indic Métric Ref    Uso Interfaz
  
  default         192.168.0.1     0.0.0.0         UG    0      0        0 p2p1
  
  192.168.0.0     *               255.255.255.0   U     0      0        0 p2p1
  
  192.168.1.0     *               255.255.255.0   U     0      0        0 p4p1

  I’m using udpxy on port 4022 for converting IPTV multicast to unicast HTTP

  udpxy -p 4022

  I execute this

  /usr/bin/ffmpeg -i "http://127.0.0.1:4022/rtp/239.0.0.76:8208" -map 0:0 -map 0:1 -c:v libx264 -vf scale=-1:720 -r 25 -profile:v high -level:v 4.0 -crf 18 -preset veryfast -maxrate 2000k -bufsize 2200k -c:a aac -ab 128k -strict -2 -ac 2 -f flv rtmp://127.0.0.1:11111/rtmp/channel1;
  
  
  
  
  
  ffmpeg version 2.7 Copyright (c) 2000-2015 the FFmpeg developers
  
    built with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
  
    configuration: --extra-libs=-ldl --prefix=/opt/ffmpeg --enable-avresample --disable-debug --enable-nonfree --enable-gpl --enable-version3 --enable-libopencore-amrnb --enable-libopencore-amrwb --disable-decoder=amrnb --disable-decoder=amrwb --enable-libpulse --enable-libx264 --enable-libx265 --enable-libfdk-aac --enable-libvorbis --enable-libmp3lame --enable-libopus --enable-libvpx --enable-libspeex --enable-libass --enable-avisynth --enable-libsoxr --enable-libxvid --enable-libvo-aacenc --enable-libvidstab
  
    libavutil      54. 27.100 / 54. 27.100
  
    libavcodec     56. 41.100 / 56. 41.100
  
    libavformat    56. 36.100 / 56. 36.100
  
    libavdevice    56.  4.100 / 56.  4.100
  
    libavfilter     5. 16.101 /  5. 16.101
  
    libavresample   2.  1.  0 /  2.  1.  0
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  2.100 /  1.  2.100
  
    libpostproc    53.  3.100 / 53.  3.100
  
  http://127.0.0.1:4022/rtp/239.0.0.76:8208: Invalid data found when processing input

  as I can solve this problem ??
  Thanks in advance

• how to use guardianproject's android ffmpeg library ?

  21 octobre 2013, par Blaze Tama

  First, this is my first time "playing" with ffmpeg, so please bear with me.

  Generally, i dont understand ffmpeg even a little bit. So i did lot, lot of researches (and also trial & error) and i finally found this project and its library

  So i was successfully created the ffmpeg and sox binary file, and i put it in the raw folder at the library project (from the link i shared).

  Now, i want to use the library for my project, but i still cant do it. I tried to use some methods in the FfmpegController like combineAudioAndVideo and more but its not working (yet).

  I dont post the error here since i still do my trial&errors (and the error change regularly) but im getting tired now.

  EDIT

  This is what i did :

  private FfmpegController ffController;
  
  
  
      @Override
  
      protected void onCreate(Bundle savedInstanceState) {
  
          super.onCreate(savedInstanceState);
  
          setContentView(R.layout.activity_main);
  
  
  
          File file = new File(Uri.parse("android.resource://com.my.package/" + R.raw.test).getPath());
  
          try {
  
              ffController = new FfmpegController(this, file);
  
          } catch (FileNotFoundException e) {
  
              // TODO Auto-generated catch block
  
              e.printStackTrace();
  
          } catch (IOException e) {
  
              // TODO Auto-generated catch block
  
              e.printStackTrace();
  
          }
  
  
  
          MediaDesc desc = ffController.combineAudioAndVideo(R.raw.test, R.raw.musictest, "test.mp4", null);
  
      }

  The combineAudioAndVideo always error because wrong parameters. It needs MediaDesc but i dont know how to do it.

  I will be very happy if you can share your working code if you have done the ffmpeg processing with this library.

• How to specify how lossy/lossless a .webm conversion will be (in ffmpeg) ?

  16 février 2021, par DistantDigit

  I can't seem to understand how to make the conversion lossless (or at least visually lossless) ? The outputs have some fast moving parts at times, and the output would become blocky ; I would like to keep it as lossless as possible, while still maintaining some compression. What would I have to tweak at the command line ? Thanks you 

  


  ffmpeg -c:v libvpx-vp9 -i in.webm -c:v libvpx -vf scale=400:416,hue=h=45:s=1 -auto-alt-ref 0 out.webm